Spring-bed.



' UNITED "STATES PATENTJOFFICE.

wILLIA E. FRANK, OF ST. Lou s, MISSOURI, 'ASSIGNORTO FOSTER BROTHERS MANUFAC- TUBING COMPANY, OF ST. LOUIS MISSOURI.

SPRING-BED.

Specification ot Letters Patent.

PatentedJ'an. 12, 1909.

Application filed May 1908, Serial No. 430,726. Renewei1 December7f1908. Serial No. 466,407.

' which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

The object of my present invention is to provide a spiral spring bed of eflicient construction which is simple, cheaply manufactured and capable of manufacture from cheaper material not permissible with good results in other constructions wherein equal efiiciency is secured, and farther to provide a bed of spiral springs which is capable of maintaining an upright position of the springs under pressure and resistin a tendency to lop over sidewise in the bed as a Whole.

Figure 1 shows a plan view of one corner of one surface of the bed of the present construction. Fig. 2 is a detail perspective View showing the form of springs and the relation of the parts. Fig. 3 is a perspective view of one of the springs employed in-the'construction.

Referring to the reference letters and figures in a more particular description, 1 indicates the spring employed in the construction which is of spiral form preferably with a reduced diameter of the convolutions at the center of the spring, but particularly provided With the tangential arms 1 -40 on the end convolution and projecting laterally substantially in the plane of the end convolution of the spring. These springs are arranged in the bed in longitudinal and lateral courses and are secured as to each course by the two longitudinal stay .wires 2, 2 on each end of the spring or in each surface of the bed, andlateral stay wires 3 also on each end of the spring or in each surface of the bed. The stay wires 2 and 3 at their ends engage with and are secured to the border or frame wire 4, one of which is provided in the plane of each end of the spring and in the plane of each surface of the bed.

The stay wires 2 are arranged substantially tangentially to the end convolution of each E. FRANK, or

V-shaped hooks 5,' which are passed under and around the end convolution of the ing a relatively wide'base engaging with the spring serves to resist, a tendency to lop over when the spring is undercompression more .or less. The spring arms 1 in each surface ofthe bed are extended to the next adjacent course of springs and at the end provided with a book, which also engages in the -V-shaped hook 5- of the stay wire before referred to, and ispassed under the lateral stay wire 3, so that the arm is securely fastened to the next adjacent course of springs without employing any extra or additional fastening device.

It will'be noted that the arm 1 is passed under the stay wire 2 with which it comes in contact, assisting in maintaining the true vertical position of the spring under pressure. The arm 1 is also of very material assistance in maintaining the spring in true vertical position, and it will be noted that the arm projecting from one end of the spring stands in substantially V-shaped relation to the arm projecting from the other end of the spring when viewed from a point in line with the spring. It will be noted also that there are no knots or sharp bends of any kind employed in the s rings, which enables them to be produced rom material of a brittle nature'and not sufliciently ductile to be employed in springs having knots or sharp bends.

What I claim as new and desire to secure by Letters Patent is:

A spring bed consisting of spiral springs having tangential lateral pro ecting arms at each end arranged in longitudinal and lateral courses in the bed, in each surface two stay wires to each course extending longitudinally and arranged tangentially to the end convolution of each spring and each having at each spring a V-shaped hook engaging with the end convolution, in each surface a stay wire for each lateral course of springs crossing the end convolution of the springs diametrically and passing through spring andat each spring are provided with said V-sha-ped books, the saidl spring anns In witness whereof, I have afiiiied my sighaving hooked ends engaging m said V nature, in presence of two witnes%s, this shape hooks at the next ad acent spring 17th day of Aprll 1908.

and retained under the lateral stay wires and WILL 5 wire border frames in the flange of the ends Witnesses:

of the springs to which the said. wires are W. T. FOSTER, attached, substantially as set forth. GEO. E. RENDELL. 

